[rt-users] take and resolve actions via email

[Asrai khn]

while reading RT3 FAQs found that ...

A2: RT 3.5 has support for take and resolve actions in rt-mailgate
script, you can use them, but you should enable them in config.

Wondering what to change in RT_SiteConfig.pm and can someone give me
an examples of how to 'take' 'resolve' tickets via email, I know how
to open new tickets in specific queue using mail.

Thanks. Askar